Monk:
Survive wearing no items in the wilderness for two game days.
Standing right outside the town gate - where monsters apparently can't reach you -
works nicely.

Paladin:
Say "Sanctus Holy" to the statue near the Nymph lake house,
or to the matching statue in an alcove south of the pyramid.

Ranger:
Retrieve an egg after killing a raptor in a little nook on the west bank of the center of the body
of water west of Valeia. The lizard only appears after initiating the quest.
Raptors also appear later around the pyramid.

Warlock:
Retrieve a skull from killing a skeleton (crypt and cemetery), and a spider egg (Mill House and
Serpent Temple).

Samurai:
Retrieve the Samurai Baton from the lead skeleton immediately southeast of Shurugeon Castle. The
Samurai only appears after initiating the quest.

Ninja:
Open the drawbridge of Shurugeon Castle from the switch in the adjacent sentry tower.

Assassin:
Take the Assassin's Dagger to any Pawn Shop
and the character will be offered the role.
The dagger is your reward from the rat at the Burned Out Hut
for killing the renegade in the Stout Mines.
You may be able to invoke it first for the Backstab trait
if you are the proper class, but anyone converting to an assassin
will also gain the trait.

Valkyrie:
Burn the Heart of the Lich in the black fire, then enter
the Temple with any female character. The Heart of the Lich is
in the pyramid. You need to jump onto the rising and falling column
in the area where the champion keys are found to get to it.

Zen Master:
Enter the Brimlock Roon dojo with one character carrying the four elemental tomes.
The Tome of Fire is in the Serpent Temple, in a room after killing
the big snake but before entering the maze of lifting platforms.
The Tome of Wind is in the Boogre caves, in the room with the Boogre witch.
The Tome of Water, oddly enough, is in a chest in the underwater city.
The Tome of Earth is in a pyramid chest.

Party Development

I dropped the Bard role from my plans - they can play magical musical instruments (instead for
which enchanted items can be made), but that's about it. The whole lock picking thing is met by the
Barbarian and others, plus the Vine Pry and Disarm Trap spells I'm using more often anyway (not as
good as BT's Trap Zap, but they work better than fumbling with lock picks).

In addition to classes, plan ahead who is going to specialize in what traits,
especially to avoid needless redundancies; it does no good
for someone to spend points developing an Artifact skill up to Level 6 if another party
member is already at Level 9. Skills max out at level 12.
In addition to their spell books and weapons, I specialized
Johne in locks, Birgitte in smithing,
Subotai in stealth fighting,
Shamino in enchanting,
Polgara in blessing,
and Raistlin in artifacts.
Here are their complimentary role developments: